In the new film, directed by robot porn aficionado Guillermo del Toro, giant monsters known as Kaiju escape from beneath the ocean after a dimensional rift really messes s**t up. But not so fast, Kaiju! Humanity's got some little — wait, huge — weapons known as Jaegers, manmade robots that are prepared to kick some serious butt.

However, the Kaiju and Jaegers weren't always so big and bad. Remember the evolution of the human? Well, multiply that by about a bazillion. In this exclusive infographic, we break down the progression of these treacherous creatures. Click on the image up top to see a bigger version.

Check out the images and gasp in horror (or amazement!) at the beauty that is evolution. Yes, at one point the Jaeger looked like a Transformer and the Kaiju resembled the dragon from "Sleeping Beauty" — but these guys do not play games.

Planning to see "Pacific Rim" this weekend? Check out our need-to-know list before heading to the movies. Also, read Film.com’s review here.